Subject: Error when signing with timestamp
Date: 2012-12-27 20:52:59
From: Armando secret
Source: error-signing-timestamp
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	When I try to sign a PDF with a timestamp server, I get the following error: "Arithmetic operation resulted in an overflow".

	Below is sample code:

	[code lang='c#']

	using (PdfImportedDocument doc = new PdfImportedDocument("input.pdf"))

	{

	    using (PdfBitmap bmp = new PdfBitmap("signature.png"))

	    {

	        PdfCertificate pdfCert = new PdfCertificate("test.pfx", "123");

	        PdfPageBase page = doc.Pages[0];

	        PdfDigitalSignature signature = new PdfDigitalSignature(doc, page, pdfCert, "Signature");

	 

	        signature.Bounds = new RectangleF(new PointF(5, 5), bmp.PhysicalDimension);

	        signature.Reason = "I agree with this document";

	        signature.Location = new PointF(100, 610);

	        signature.Appearence.Normal.Graphics.DrawImage(bmp, 0, 0);

	        signature.TimeStampServer = new TimeStampServer(new Uri("http://timestamp.globalsign.com/scripts/timstamp.dll"));

	 

	        doc.Save("output.pdf"); //<---- here is where exception is thrown

	    }

	}

	[/code]

	I'm using the latest version (5.1.40.12221)

	Thanks

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